SETRBUF(3PVM)

💖 SETRBUF — pvm_setrbuf 💖

okay bestie, so we're in the PVM Version 3.4 manual, page SETRBUF(3PVM), and this one is literally about swapping which receive buffer is the active one. it's giving buffer chaos management and honestly? iconic. 🎀

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✨ NAME ✨

pvm_setrbuf — switches the active receive buffer and saves the previous buffer. no cap. 💅

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🌸 SYNOPSIS 🌸

C girlies:

int oldbuf = pvm_setrbuf( int bufid )

Fortran girlies:

call pvmfsetrbuf( bufid, oldbuf )

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🦋 PARAMETERS 🦋

• bufid — an Integer, bestie. it's the message buffer identifier for the new active receive buffer. this is who you're switching to. 👑
• oldbuf — an Integer that gets returned to you, holding the message buffer identifier of the previous active receive buffer. it's the "don't forget where you came from" of it all. 🥺

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💜 DESCRIPTION 💜

so pvm_setrbuf switches the active receive buffer over to bufid, and it saves the previous active receive buffer into oldbuf. simple. slay. ✨

and listen — if bufid is set to 0, then the present active receive buffer gets saved and no active receive buffer exists. that's the vibe. 🫶

a successful receive automatically creates a new active receive buffer, periodt. so if a previous receive hasn't been unpacked yet and you need to keep it around for later, you can save that previous bufid and reset it to the active buffer later for unpacking. it's giving "hold my place, i'll be right back." 😭

this routine is required when you're managing multiple message buffers. think switching back and forth between two buffers. one buffer could be sending info to a graphical interface while a second buffer is sending data to other tasks in the application. two buffers, one girl, zero stress. 🌈

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🎀 EXAMPLES 🎀

C bestie:

rbuf1 = pvm_setrbuf( rbuf2 );

Fortran bestie:

CALL PVMFSETRBUF( NEWBUF, OLDBUF )

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🔥 ERRORS 🔥

these error conditions can be returned by pvm_setrbuf, and yes we're reading them all, no skipping:

• PvmBadParam — you gave an invalid bufid. 🚩
• PvmNoSuchBuf — you tried to switch to a non-existent message buffer. it's not there, bestie. it literally never was. 💀

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⭐ SEE ALSO ⭐

pvm_setsbuf(3PVM) — go read that one next, iykyk. 🧚

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and that's the whole page! this one came from PVM Version 3.4 and it's dated 30 August, 1993 — oldie but a goodie, fr fr. mwah, take care of your buffers bestie 💖✨🎀🦋🌸💅🫶